患者，男，27岁，10年前因颈前包块并皮肤瘘口行手术治疗。术后诊断为甲状舌管囊肿。近5个月于颈前偏左、喉上方出现鸽蛋大的包块，囊性。近半月突然增大并疼痛，触痛明显。包块随吞咽上下移动，可能是（）。
A.囊性水瘤
B.甲状舌管囊及瘘管
C.亚急性甲状腺炎
D.颈部淋巴结炎
E.甲状舌管瘘管合并感染
参考答案：E
解析：甲状舌管囊肿及瘘管是发病率最高的颈部先天性疾病，由甲状舌管发育异常引起。囊肿多位于舌骨下方；瘘管包括同时具有内、外瘘口的完全性瘘管和只具有外瘘口的不完全性瘘管。囊肿质软，无压痛，合并感染后可有明显疼痛。因它与舌骨关系密切，可随吞咽运动而上下活动，切除不彻底可复发。本例曾有甲状舌管瘘管切除病史，发病经过较缓慢，符合甲状舌管囊肿的特点，因前次切除了外瘘口但整体切除不彻底而复发，合并感染后肿块突然增大，并有疼痛等症状。
| Questions 84-90 are based on the following passage. Imagine a society in which cash no longer exists. Instead "cash" is electronic, as in bankcard systems. Currency and coin are abandoned. The immediate benefits would be profound and fundamental. Theft of cash would become impossible. Bank robberies and cash-register robberies would simply cease to occur. Attacks on shopkeepers, taxi drivers, and cashiers would all end. Purse snatchings would become a thing of the past. Urban streets would become safer. Retail shops in once-dangerous areas could operate in safety. Security costs and insurance rates would fall. Property values would rise. Neighborhoods would improve. Drug traffickers and their clients, burglars and receivers of stolen property, arsonists for hire, and bribe-takers would no longer have the advantage of using untraceable currency. Electronic "money" would leave incriminating wails of data, resulting in more arrests and convictions. These prosecutions, in turn, would inhibit further crimes. The impact of the monetary change on underground economies would be nearly as dramatic as the effect on crime. In the United States, the underground economy is estimated at between 10% and 28% of the gross national product. Internal Revenue Service (IRS) researches suggest that almost all hidden labor is paid in currency. In a society devoid of physical money, a change from cash to recorded electronic money would be accompanied by a flow of previously unpaid income-tax revenues running in the tens of billions of dollars. As a result, income-tax rates could be lowered and the national debt reduced. Cash has been the root of much social and economic evil. The emergence of electronic funds-transfer technology makes it possible to change the nature of money and to divorce it from evil. Eighty percent of Americans regularly use credit cards. The development of a federal system to handle the country’ s 300 billion annual cash transactions in the United States electronically is within reach. A national electronic-money system would operate as debit-card system. Each individual’s "money" would be held in his money-system account. A transaction would effect an instant transfer of "money" from his account to that of another account holder. The principal differences between a national electronic-money system and commercial bank-card systems would be: the money system would be federally operated; payment would constitute "legal tender"; system-account holders would be able to receive as well as pay out funds by use of their accounts; and funds would be transferable between private-account holders as well as between merchants and private-account holders. Only cash would be supplanted by electronic money. The use of checks, drafts, money orders, traveler’s checks, cashier’s checks, as well as letters of credit, acceptances, and other financial instruments would remain in regular use. Credit card and automatic-teller-machine systems (ATMs) would not necessarily change, although you could no longer obtain cash at ATMs. |
To abandon the use of cash, according to the author, can in many ways help people ______.
A．avoid many problems that upset the society
B．get rid of petty theft and property robbery
C．remove all the trouble that bewilders them
D．get a better living environment